Schwartz Dominique, Mariotti A., Lanfranchi R., Guillet B. (1986). 13C/12C ratios of soil organic matter as indicators of vegetation changes in the Congo. Geoderma, 39 (2), p. 97-103. ISSN 0016-7061.
Titre du document
13C/12C ratios of soil organic matter as indicators of vegetation changes in the Congo
Année de publication
1986
Type de document
Article
Auteurs
Schwartz Dominique, Mariotti A., Lanfranchi R., Guillet B.
Source
Geoderma, 1986,
39 (2), p. 97-103 ISSN 0016-7061
The 13C/12C ratios were determined for the organic matter of all horizons of a podzol profile and of the A1 horizons of some ferrallitic soils, in some grass shoots and in a fossil root fragment from the B2h horizon of the podzol. The isotope ratio in the organic matter of the A1 horizon of the podzol matches those in grass shoots from the present savanna vegetation. The ratios in the lower horizons match those of organic matter in the A1 horizons of soils under forest and that of the fossil root fragment in the B2h horizon. The ratios thus demonstrate that the humus enrichment of the B2h horizon of the podzol occurred while it was under forest vegetation and that the present grass vegetation did not take part in the podzolization process. The differences also indicate that savanna replaced forest vegetation after the profile had been formed.
Plan de classement
Constituants et propriétés des sols [068PROSOL]
Descripteurs
QUATERNAIRE ; DATATION ; PODZOLISATION ; C 12 ; C 13
